Frustrated

Today I receive an email from my surgeon saying that my health insurance will not cover my surgery on the 26th.  It seem that my surgeon takes my name of insurance but not the kind.  They thought I had a PPO but I have a HMO.  I don't get it because their insurance person told me everything was good to go.  Now I had to request a medical review to See if they will cover it or I will have to see a new neurosurgeon that they say.  My emotions have been so raw and getting worse with my date approaching.  I don't know if I can take seeing another Doc and getting his opinion of what to do.